| No | Pattern | Freq | Relations |
|---|---|---|---|
| 1 | carry out by [art] office of | 6 |
|
| 2 | carry out by [art] office [prep] | 6 |
|
| 3 | carry out by [art] office [prep] | 6 |
|
| 4 | carry out by [art] office of | 6 |
|
